Machine for making links for chains



M. 0. REHFUSS. MACHINE FOR MAKING LINKS FOR cIIAINs.

APPLICATION FILED MAR. 14, I919- Patented Nov; 23,1920.

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M. 0. REI'IFUSS. MACHINE FOR MAKING LINKS FOR CHAINS.

APPLICATION FILED MAR. 14} I 9I9- Patented Nov. 23, 1920.-

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APPLICATION FILED MAR 14, l9i9.

Patented Nov; 23, 1920.

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MARTIN onnnrnss or ririnanntrrrrn, PENNSYLVANIAQASSIGN'OR To niv irnn STATES CHAIN A171) FORGING GOMPANY', OF PITTSBURGH,-

CORPORATION OF PENNSYLVANIA.

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MACHINE non MAKING LINKS non 01mins.

Specification of Letters Patent.

hApplication filed March 14, 1919. Serial No. 282,70}.

Be it known that I, MARTIN O. REHrUss,

a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented Machines for Making Links for Chains, of which the following is a specification.

One object of this invention is to provide a relatively simple substantial and compact machine for IOI'IIllHg a predetermined length of rod or wire material into a chain link and which shall becharacterized by the inclusion of a single reciprocating slide, together with coacting elements wherebythe link is completely formed by a single movement of said slide in one direction ;-the invention'contemplating a novel arrangement of'bending arms and forming rolls relative to a king post on which-thellink is tobe formed.;; 7

These objects and other advantageous ends I attain as hereinafter set forth, reference the accompanying draw ngs, in

Figuresl and 2 are respectively a side elevation and a plan of a'machine constructed in accordance with ,my invention;

, Fig. ,3 is a front elevation of the machinei shown .in Figs. 1 and'2; and V V Figs. 4 and :5 are plan views like Fig. 2,

- showing thefkingupostin horizontal section and illustrating the operation. of the-machine. L,

In the above drawings'l represents a fiat -top base plate on whichare fixed integrally or otherwise a pair of longitudinallyzextending parallelribsEZ. Each of these has fixed to ajportion of its top face an overhanging plate 3. co-actingwith it to form a guidewayfor a'block or slide 4: operative 'upon the top face of the base 1 on which it is reciprocable by any suitable mechanism whose detail construction forms no part ofthe present invention.

On theforward end of each theparallel ribs 2 is mounteda roller 5 rotatable upon a vertical spindle 6 whose lower end 18 threaded into or otherwise fixed in said rib v and whose upper end is. supported by an able manner so that the block or slide 4; is v movable under its lower end. Said lower.

overhanging bracket 7 carried: by the base plate 1. "Adj acent one end of the latter is a vertically movable-head f8 slidably guided in a standard 9 '(Fig. 1') supported in any suitsaid rod ofwhich the link is to be formed.

, their freeends, cam structures 16 positioned to coact with the rollers 5 5 as the block or slide is moved forwardly. Said arms, also intermediate form indicated'at cc 'in Fig. 4.

curved as to permit them to fulfil theirfuhc-i ition 10 of the and 11 of whichthe first has'the outline of to give to the interior of the finished link.

In order to hold arod 00 against the king 0st, I provide a bar 12 sli dable longitudinally of the block in a guideway 13 mount ed thereon, and cylindrically concave its forward end to fit the cylindrical surface of Upon the upper face of the slide or block 4 on either side of the bar 12 I pivotally mount a sw nging arm 14 upon a bolt 15 and so arrange said armsthat they extend forwardly ofthe block. from said pivots. bolts andare free to swing toward andfrom each other. i i x i For forcibly moving arms toward; each otherI form them with or otherwise.

attach to them adjacent the outer sides 'of carry on their adjacent sides oppositely placed grooved bending rolls 17 so formed as j to engage theendportions of a rod ai-held against the king post, and the cam surfaces 16 are so, mounted that when they are Eacted 1 upon by the rolls j forward they cause the rolls 17 to coact with Y 1, the slide 4 is moved the king post to bend said rod minto its Also mounted on opposite sides of the holding bar. 12 is asecond pairfof peripherally grooved bending .rolls..1 8 rotatably mounted on spindles l9- projecting jvertically up fromth'e slide 4: and so' ;positioned as to cooperate with thepart ll of'thelking,

post to give the partially formed link m its final shape 00 tions without interference j with these latter rolls. It is noted that the guide ribs 3are so formed as to serve as stops to limit the outward swing of the, arms 14: and to some I extent support them at the time of their first engagement with the rod :0 to be bent. Under conditions of operation the head 8 is loweredin its' guide until the larger porking post lies in a horizontal planeincluiinng thebarlQ 'aftera-prede- 105 termined length of the rod wto be formed' Patented Nov. 23, 1920.

andthearm s 14 are sobentor V has been fed or placed back of this part of said post, the holding bar 12 is moved so as to firmly clamp the middle portion of the rodagainst it. Thereafter the slide or block 5. 4 is moved forward toward and under the king post, thus causing the grooved. rolls. 1?

to engage the. ends of said rod and bend these at first forwardly, then the cam surfaces 16 coact with the rollers 5, force them first parallel with each other around the part 10 of the .kingpost and finally curve them in toward each other into the relative positions indicated at m in Fig. i.

As the forward movement of the slide at is V continued the cam portions 16 ofthe arms 14 pass the rollers 5 and the head 8 is raised a so that thejsmall portion 11 of t 1e king post is brought into the hollow of the partially formed link, the'gripping action of the hold- 20 ing bar 12beingtemporarily relaxed during this upward inovement and thereafter again applied. The rolls lS-noir come into engagement with the opposite end portions of the partially formed linkw forcing its extremities toward and finally into intimate engagement with each other so that it assumes the that by the mechanism illustrated I first give a straight lengthof'rod material a preliminary bend to form a partlal-ly closed link andthereafter complete the bending to cause 7 said intermediate shape to assume the form of a finished link. lVhilefthese operations occur successively, they are both performed during a single forward movement of the single slide 4 and resultinthe formation of a l nk of the des red form whose extremities are engagement and are not deformed in any way by the forming operation. I claim: 7 I '1. The combination in a link forming machine ofa reciprocating slide; a'king post; and mechanism on said slide for bending a straight rodaround the post to form a co mpletel link during movement of said slide in one direction. '2. The-combinationin' a link'formi'ng machine of a reciprocatingsl'idefa king post having two differently shaped link forming parts ;-and mechanism on said slide for bend- ""ing a straight rod'aroiindthe 'two parts of the post successively to form a complete link during movement ofsaid slide in one ,direction.

3. The combination of a reciprocating slide a king post; and two pairs of bending members on the slide placed to successively engage a length of rod material to bend it around the post 111 the form of a complete link during the movement of said-slide in one direction.

4. The combination in a link forming machine of a reciprocatory slide;'a' king post; two pairs of bending rolls on the slide mounted to successively engage a rod held against the kin-g post; and means for supporting one pairof said rolls to permit it to be bodily moved toward the king post during its operation on the rod under treatment.

5. The combination in a link forming machineof a recipro'catory slide; a king post";

two-arms pivotally mounted on the slide; members carried bysaid arms for engaging .a-rod to be bent around the king post; means for swinging thearms toward each other while they are acting on the rod; and mem-' bers also carried by the slide for completing the formation of the link partially shaped by said swinging'arms, duringam'ovement 'of sa1d-sl1de1n one directlon. a

6; The combinationin a'link formingmachine ofa reciproca'ble'slide; a king post; a 1 pair of rollers for operatingon arod'held against the king post; means for causing bodily movement toward each other'of'said 1 rolls during their operation on the rod; and

a secondset of-rolls mounted on the slide in positions to complete the formation of a link partially Iformedby said first rolls, during movement of the slide in one direction.

. 7. The combination in a link forming ma chine of 'a re'ciproc'atory slide; two arms pivoted thereon; a king post; rolls carriedby said arms; a cam mechanism for-forcing the arms with the rolls toward each'other as the'slide is moved in one direction to cause said rolls to give preliminary bends .to a rod engagedby the post; with a second pair of relatively fixed rolls positionedon. the slide.

to engagefthepartially formed link primarily shaped'by said first rolls, to complete the link.

8. The combination in a'linkforming -machine of a king postlhaving a plurality of link shaping portions; a reciprocatory slide;

a device on said slide for giving a'straight rod a preliminary shape when it engagesone of the parts of'the king post; and a second device also carried by the slide'for givingthe partially formed link a final shape upon'the second part of the king post.

'9. The combination in a link forming ma chine of alongitudinally adjustable king post having twolink forming portions; a rec1proc'atory'- slide; and two "sets of rollers mounted ont-he'slide to successivelyengage a length of rod material and respectively give it preliminary form on one part of the king post and thereafter give it a final form on the second part of said post,'while said slide is being moved in one direction.

10. The combination in a link forming machine of a king post; a reciprocatory slide; means for clamping a length of rod material successively to two differently shaped portions of said king post; and two sets of members carried by the slide for operating on said rod material first when it is engaged with one part of the king post and thereafter when it 1s engaged with the second part of said post and during a single movetwo other rolls relatively fixed on the slide i for engaging a length ofrod material to com plete a link after said material has been given a preliminary form by said first rolls; 12, The combination in alink forming machine of a slide; a king post; a pair of rolls movably mounted on the slide; means for causing saidrolls to pass around from one side to the other of the king post as the slide is moved in one direction to give a length'Qf.

rod material a preliminary form; and mem- 35 bers also on the slide for subsequently engaging the partially shaped link to force its ends into substantial engagement and come plete the link.

' 13. The combination in a link forming ma chine of a reciprocatingslide; a king post; and two independent sets of devices on said slide positioned to successively bend a straight rod around plete link during movement of one direction.

In witness whereof MART N O. REHFUSS.

the post to form acomsaid slide in z 4-5 I afiix my signature; g 

